Chalcopyrite (CuFeS₂) is vital to the earth's geology. A primary ore of copper, this scintillating mineral is influential to health,...

Talc or hydrated magnesium silicate is a naturally occurring mineral, primarily composed of magnesium, silicon, and oxygen. With its...

Oil of Brick is known as Oil of Philosophers by alchemists and Oleum de Lateribus  (Oil on the Sides) by apothecaries. This medicinal and...

Corundum is a mineral composed of aluminum oxide. Living deep within the Earth in an environment of intense heat and pressure, the...

Rust is a complex chemical reaction from the interaction of iron, oxygen, and moisture. This common phenomenon produces striking colors...

Goethite is common but like hematite a remarkable iron oxide mineral. In geology and mineralogy, goethite has piqued the interest of...